Harrow-tooth fastening.



I. H. BROWN.

HARROW TOOTH FASTENING. APPLICATION FILED DEC. II, 1913.

Patnted Ja1 1.18,1916.

2 SHEETS-SHEET I.

'nu: coununm PLANOGRAPH co., WASHINGTON, D. C.

APPLICATION FILED DEC. H, ISIS.

Patented Jan. 18, 1916.

2 SHEETS-SHEET 2 .JOI'IN HOOD BROWN, 0F MORLEY, MISSOURI.

HARROW-TOOTH FASTENING.

messes.

Specification of Letters Patent.

Patented Jan. is, rate.

Application filed December 11, 1913. Serial No. 806,009.

To all whom it may concern:

Be it known that 1, Joint H. BROWN, a citizen of the United States,residing at Morley, in the county of Scott and State of Missouri, haveinvented certain new and useful Improvements in Harrow-Tooth Fastenings,of which the following is a specification, reference being had thereinto the accon'ipanying drawing.

My invention relates to improvements in harrow tooth fastenings, andpertains to a means for connecting a harrow tooth to a harrow, and alsomeans for adjusting the said tooth after it has been attached.

The object of my present invention is to provide an improved and simplemeansfor both changing the angle of the harrow tooth and also foradjusting the length of the tooth which will penetrate the ground to becultivated.

By my invention a harrow tooth may be easily and quickly applied anddetached from a harrow frame. My improved means of attachment alsopermits a simple and rapid adjustment of the harrow tooth from oneangleto another, and also allows a vertical adjustment of the saidtooth. By this it will be seen that my improved means cornbines both anattachment and an adjustment.

In the accompanying drawingsFigure 1 is a. perspective view of a harrowcomposed of a plurality of V-shaped sections to which is applied myimproved form of harrow tooth fastening. Fig. 2 is a perspective view ofa section of the angular plate, of which the harrow frame is constructedshowing my improved fastening applied thereto. Fig. 8 is a perspectiveView of a section of the angular iron or plate of which the harrow isformed and showing my improved fastening and adjusting means appliedthereto, said adjusting means and harrow tooth are shown in disassembledrelation. Fig. i is a perspective View of asection of a modified formofa harrow frame showing my improved fastening and adj usting meansapplied thereto. Fig. 5 is a perspective view of a section of theangular plate showing a modified form of quadrant slot therein.

Referring now to the drawings in which like reference numerals designatesimilar parts, 1 represents the frame of the harrow which is here shownconstructed of an L-shaped beam which has its longer leg 2 arranged in avertical position. Arranged at regular intervals in the long leg of thebar 1, are slots 3. These slots as shown are of a quadrant shape, but aswill be apparent as hereinafter pointed out these slots may readily beof a semi-circular form without departing from the spirit and scope ofmy invention. I provide corrugations l, on the inner edges of the saidslots 3, the objects of which will be hereinafter described and pointedout.

At regular intervals a rectangular slot 5, is cut in the shorter leg 6,of the l.-shaped beam 1. rectly below the quadrant slots 3. They. are oflength considerably longer than the thickness of the harrow teeth 7which are adapted to be placed therewithin.

My attaching and clamping means for securing the harrow tooth to theframe, consists of a U-shaped clamping bolt or staple 8 having itsextremities 9 externally screw threaded. This U-shaped bolt 8, isadapted to straddle the harrow tooth 7, and then pass through thequadrant slot 3. In order to hold the staple in any desired positionwithin the quadrant slot, 1 provide a rectangular plate 9 having twoopenings 10 adapted to receive the ends 9 of the bolt, the said platebeing adapted to be clamped against the outer face of the portion 2 ofthe beam by nuts 11. The rectangular plate is provided in order toprevent the lJ-shaped bolt from spreading and prevents all liability ofthe harrow tooth moving within the quadrant slot after the nuts 11 haveonce been screwed down tightly.

Nhen it is desired to attach the harrow tooth to the frame, the tooth isfirst inserted within the slot 5, the pointed end placed below the slotas will be readily understood. The U-shaped bolt 8 is then slipped overthe tooth and its outer ends passed through the quadrant slot 3. Theplate 9 is' then slipped. over the screw threaded ends 9 of the U-shapedbolt 8, the ends 9 passing through the holes 10 of the plate. The nuts11 are then screwed on the ends 9 and as the nuts 11 work down on thescrew threads of the ends of the bolt, they will draw the curved portionof the U-shaped bolt tightly around the harrow tooth and clamp the platefirmly against the outer side of the portion 2 of the L-shaped beam 1.

If after the harrow tooth has been applied it is desired to make thesaid tooth These slots 5, are'arranged di-.

, Fig. 2. When it is desired to slant the tooth backward, it is readilyapparent that the operation-is simply reversed;

lvhenever'it is desired to adjust'the digging depth of the tooth it issimply necessary to loosen the bolts 11 as has been described above andthe harrow tooth. is then I .free to be moved up or down through therectangular opening 5 and then by tightening the nuts 11 it may beclamped in any desired position.

The corrugations 4 on the inner edges of the slots 3 are provided toovercome and obmove out of its adjusted position. much as I there isconsiderable pressure viate the tendency of the-bolt 8 to slip, after ithas been clamped in any desired position, and in slipping consequentlylet the tooth 7 Insoagainst the'end' of the harrow tooth 7 when it is inoperation, these corrugations together with the plate'9 and the bolts 11firmly clamp the tooth and hold'it against any movement.

My specific form of harrow frame are rangement and also the arrangementof the teeth thereupon form the subject matter of" a co -pendingapplication and are here shown only to indicate the manner in which myimproved tooth fastening device may be at tached.

Fig. l makesit apparent that my .im

"'provement may be attached to a-.harrow beam of rectangular form and,many other forms of beams may be used in conjunction with my improvedadjusting and fastening means without departing from the spirit andscope of my. invention.

In'the modification shown in Fig. 5 the quadrant slot 3 is shown withoutany corrugations for the reason that under some circumstances thecorrugations on the slot are not necessary to hold the tooth in itsadjusted positio .Having thus described my invention, What I claimanddesire to secure by Letters Patent is:

1. The combination with a harrow frame, the said frame constructed of anL-shaped 1 beam, a quadrant slot cut in the vertical por- 5 Copies ofthisv patent may be obtained for five cents each, by addressing theCommissioner ofPatents,

tion of the beam and extending longitudinally thereof, a rectangularslot cut in the Iorw'ard along the edges of the quadrant;

horizontal portion of the beam, the said slots arranged one above theother, said horizontal slot arranged between the ends of, the

quadrant slot, of a harrow tooth, and means engaging the harrow toothpassing through the quadrant slot thereto. j a

2. The co'mbination'with a harro-w frame, the said frame constructed ofan L-shaped for holding the'said tooth beam, a quadrant slot cut in thevertical portion of the beamand extending longitu dinally thereof, arectangular slot cut in the horizontal portion of the beam, said slotsarranged one above the other, of a harrow tooth, and means engaging theharrow tooth I passing through the quadrant slot for holdslots arrangedone above the other, of a harrow tooth passing through the rectangularslot in the horizontal, portion, a U-shaped bolt embracing and engagingsaid tooth and having its ends projecting through the said quadrantslot, and a plate having oppositely arranged openings adapted to receivethe extending ends of .the U-shaped bolt, and nuts threaded on the endsof the said bolts, whereby the said plate maybe clamped againsttheoutside of the vertical portion of the beam'and thereby hold theU-shaped bolt and the harrow tooth, in its adjusted position, the partsarranged as and for the purpose described.

the said frame. constructed of an l 'shaped 1. The combination with aharrow frame,

beam, a quadrantslot having corrugations on the edges thereof cut in thevertical portion of the beam and extending longitudinally thereof, arectangular slot cut in the horizontal portion of the beam, the saidslots arranged one above the other, of'a.

harrow tooth passing through the rectangular slot in the horizontalportion,ai U.-shaped bolt embracing and engaging the said tooth andhaving its ends projecting through the said quadrant slot and meansapplied to the said projecting ends of the U-shaped bolt'to I preventthe spreading thereofand to adj ust-' ably clamp the harrow'tooth to'thebeam.

Bin-testimony whereofI hereunto affix my signature in thepresence'of twowitnesses;

' JOHN HOOD BROl/VN. /Vitnesses:

. BRIGGS CARSON, C. W. FULwoon.

Washington, D. G.

